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engines/dgds/ads.h

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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef DGDS_ADS_H
+#define DGDS_ADS_H
+
+#include "dgds/scripts.h"
+#include "dgds/ttm.h"
+
+namespace Dgds {
+
+class ADSData : public ScriptParserData {
+public:
+	ADSData() : _maxSegments(0), _scriptDelay(-1), _hitTTMOp0110(false), _hitBranchOp(false),
+			_gotoTarget(-1), _runningSegmentIdx(0) {
+		for (int i = 0; i < ARRAYSIZE(_state); i++)
+			_state[i] = 8;
+
+		for (int i = 0; i < ARRAYSIZE(_segments); i++)
+			_segments[i] = -1;
+
+		ARRAYCLEAR(_countdown);
+		ARRAYCLEAR(_charWhile);
+	}
+	Common::Array<Common::String> _scriptNames;
+	Common::Array<TTMEnviro> _scriptEnvs;
+	Common::Array<Common::SharedPtr<TTMSeq>> _ttmSeqs;	// Pointers as we need to shuffle them but keep _usedSeqs below valid
+	int _maxSegments;
+	// TODO: replace these with dynamic arrays - fixed arrays inherited from original.
+	int _state[80];
+	int _countdown[80];
+	// note: originals uses char * but we use offsets into script for less pointers. -1 is nullptr
+	int32 _segments[80];
+	int32 _charWhile[80];
+	Common::Array<Common::SharedPtr<TTMSeq>> _usedSeqs[80];
+	int32 _scriptDelay;
+	int32 _gotoTarget;
+	bool _hitTTMOp0110;
+	bool _hitBranchOp;
+	int16 _runningSegmentIdx;
+
+	Common::Error syncState(Common::Serializer &s);
+};
+
+class ADSInterpreter {
+public:
+	ADSInterpreter(DgdsEngine *vm);
+	~ADSInterpreter();
+
+	bool load(const Common::String &filename);
+	void unload();
+	bool run();
+	int numArgs(uint16 opcode) const;
+	void segmentOrState(int16 seg, uint16 val);
+	void segmentSetState(int16 seg, uint16 val);
+
+	void setHitTTMOp0110(bool val = true); // TODO: better name for this global?
+	bool getHitTTMOp0110() const { return _adsData->_hitTTMOp0110; }
+	void setGotoTarget(int32 target);
+	int16 getStateForSceneOp(uint16 segnum);
+	void setScriptDelay(int16 delay) { _adsData->_scriptDelay = delay; }
+
+	Common::Error syncState(Common::Serializer &s);
+
+protected:
+	bool handleOperation(uint16 code, Common::SeekableReadStream *scr);
+	void handleRandomOp(Common::SeekableReadStream *scr);
+	bool handleLogicOp(uint16 code,  Common::SeekableReadStream *scr);
+	bool logicOpResult(uint16 code, const TTMEnviro *env, const TTMSeq *seq, uint16 arg);
+	int16 randomOpGetProportion(uint16 code, Common::SeekableReadStream *scr);
+	bool playScene();
+	bool skipToElseOrEndif();
+	bool skipToEndIf();
+	bool skipToEndWhile();
+	bool skipSceneLogicBranch();
+	Common::SharedPtr<TTMSeq> findTTMSeq(int16 enviro, int16 seq);
+	TTMEnviro *findTTMEnviro(int16 enviro);
+	bool runUntilBranchOpOrEnd();
+	void findUsedSequencesForSegment(int segno);
+	void findEndOrInitOp();
+	bool updateSeqTimeAndFrame(const TTMEnviro *env, Common::SharedPtr<TTMSeq> seq);
+	int getArrIndexOfSegNum(uint16 segnum);
+
+	DgdsEngine *_vm;
+	TTMInterpreter *_ttmInterpreter;
+
+	Common::HashMap<Common::String, ADSData> _adsTexts;
+	ADSData *_adsData;
+
+	Common::SharedPtr<TTMSeq> _currentTTMSeq;
+};
+
+} // end namespace Dgds
+
+#endif // DGDS_ADS_H